Charles married Gertrude Gouverneur Burnet. Gertrude (daughter of Isaac Gouverneur Burnet, Sr. and Keturah "Kitty" Winn Gordon) was born 9 Oct 1821, Cincinnati, Hamilton County, Ohio; died 1910, Shelbyville, Shelby County, Indiana. [Group Sheet]

1. Gordon Jennings was born 1843.
2. Sarah Jennings was born 1844.
3. Keturah Jennings was born 1844.
4. Cornelia Curtis Jennings was born 8 May 1845, Michigan; died 15 Aug 1926, Shelbyville, Shelby County, Indiana.
5. Charles Gordon Jennings was born 24 Oct 1846, Cincinnati, Hamilton County, Ohio; died 10 Sep 1920, Emporia, Kansas.
6. Thorpe Butterworth Jennings was born 16 Sep 1848, Fleming County, Kentucky; died 7 Nov 1925; was buried , Lebo, Coffey County, Kansas.
7. Isaac Gouverneur Burnet Jennings was born 13 Jan 1850, Mason County, Kentucky; died 20 Nov 1917, Shenandoah, Page County, Iowa; was buried , Shenandoah, Page County, Iowa.
8. Gertrude Gouverneur Jennings was born 12 Sep 1851, Mays Lick, Mason County, Kentucky; died 4 Aug 1933, River Forest, Cook County, Illinois; was buried , Forest Park, Cook County, Illinois.
9. Anna Sargent Jennings was born 20 Feb 1855, Burlington, Carroll County, Indiana; died 22 Sep 1897, Cambridge, Middlesex County, Massachusetts; was buried , Cambridge, Middlesex County, Massachusetts, USA.
10. Mary Resor Jennings was born 27 Jul 1857; died 1 Sep 1879.
11. Staats Dunbar Jennings was born 17 Aug 1860; died 17 Sep 1879.